Graham Gunderson's Energy conference presentation Most impressive and mysterious

[Spokane1]

Dear All,

The value of the final load resistor has a large impact on the performance of this kind of circuit.

I started with a 50 Ohm 10 Watt resistor with an inductance of 3.4 uH. The performance was a COP of 0.167

I explored different values and the best one was a 10 Ohm power resistor with an inductance of .8 uH which raised the COP up to 0.274. That is a 60% improvement over the last reading.

This circuit appears to function best with the proper matching load, much like other AC circuits.

Spokane1

[Enjoykin2017]

Dear All,

The value of the final load resistor has a large impact on the performance of this kind of circuit
....

Spokane1

Hello Spokane1

Why don´t use several parallel HEXFETs in linear mode as variable load resistor from couple of watts till some 200....300W ?

Thanks for interesting topic. Good luck !! 
Enjoykin

[Spokane1]

Hello Spokane1

Why don´t use several parallel HEXFETs in linear mode as variable load resistor from couple of watts till some 200....300W ?

Thanks for interesting topic. Good luck !! 
Enjoykin

Dear Enjoykin,
A solid state variable resistor like you describe is certaily a viable option, but probably excessive in this appliction for the moment. I would jup for joy if I got 10 Watts of Output. I suspect that 20 Watts is probably the upper limit on this topology.
As it is I have a nice selection of classical low resistance rehostats on hand at the right price to carry on these preliminary experiments. Now if the power level gets beyond 20 Watts then a solution like what you recommend would be in order.
Spokane1

[Enjoykin2017]

Dear  Spokane1

Thank you.!
I am waiting your further research.

Best wishes
Enjoykin

[Enjoykin2017]

Ok, so, Scientifically, what do we know.

1: Input Winding appears to be 10, 12, 10, 12, 10, 12, possibly only 6 layers, of Litz Wire, about AWG 2 (6.54304 mm) @ approx 0.512664 Ohms per KM.

2: Output Coils consist of 4 Strands of Litz wire, each wound side by side, in a step winding configuration, Almost Bank Winding. Each set of winding's is divided into two parts. Each set of windings appear to be wound CW/CCW relative to the Core.

3: Output is DC, Rectified, via a circuit arrangement of possible 30 odd components.

4: Pulsed DC is the Input. As Reiyuki points out, about 33% 33% 33%

5: Permanent Magnets are arranged on the Device, thought to Bias, or partially saturate at least one half of the U Cores used.

6: U Cores are a Ferrite Material, apparently each has a different value of Permeability. No specifics that I know about have been shared as yet. (The below product guide, has an AL range from: 2300 to: 8700 (nH measured in combination with another ungapped core half))

7: U Core appears to be approximately square, a product selection guide can be found here: Ferroxcube, the largest U Core in this document is in the Picture below: (Which is about right, I have some magnets the same here (25 x 40 x 10) and they would fit about the same on the Core)

Chris Sykes
hyiq.org

Chris if your data are truth i can conclude only one thing. This device work on principles of parametric Ferro-Resonance in high flux ferrites.

Do you have valid frequency and timings of operation ??


PS: I think answer for existing phenomenon is here in this old Russian scientist´s book about Ferosondes.

The name of important topic is: "Еmployment of parametric resonance to increasing sensitivity of ferrosondes", with tuning procedures at end.

ps1: Tunning procedure obligatory need spectrum analyser // high bandwith // plus oscillograph.

ps2: Gunderson's huge ferrite core with help of strong permanent magnets can generate a lot of output power. At first estimation as far as 50 kWatt output but maybe a lot of more. Remember Tesla's car  "Pierce Silver Arrow", with 3 big ferrite rods.

Enjoykin2017